197849747 has 2 divisors, whose sum is σ = 197849748. Its totient is φ = 197849746.

The previous prime is 197849737. The next prime is 197849761. The reversal of 197849747 is 747948791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197849747 - 2⁴ = 197849731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 197849692 and 197849701.

It is not a weakly prime, because it can be changed into another prime (197849737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98924873 + 98924874.

It is an arithmetic number, because the mean of its divisors is an integer number (98924874).

Almost surely, 2^197849747 is an apocalyptic number.

197849747 is a deficient number, since it is larger than the sum of its proper divisors (1).

197849747 is an equidigital number, since it uses as much as digits as its factorization.

197849747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3556224, while the sum is 56.

The square root of 197849747 is about 14065.9072583321. The cubic root of 197849747 is about 582.7001990118.

The spelling of 197849747 in words is "one hundred ninety-seven million, eight hundred forty-nine thousand, seven hundred forty-seven".